All people are treated the same, regardless of their initial level of utility. The reason for saying this is that, the idea puts a condition that none of the individual should not get worse off is actually a case of value judgment.
Contact Welfare economics — definition and meaning Welfare economics is a branch of economics that focuses not only on efficiency, but also improving human welfare and social conditions. Walrasian equilibria  produce Pareto efficient outcomes.
In order to measure social welfare, economists use two fundamental approaches — The New Welfare Economics approach and the neoclassical one.
Also, the economists of the Austrian School question the relevance of Pareto optimal allocation considering situations where the framework of means and ends is not perfectly known, since neoclassical theory always assumes that the ends-means framework is perfectly defined.
According to BusinessDictionary. This decision is made, either tacitly or overtly, when we specify the social welfare function. A new and more limited criterion was then developed for judging economic policy: one economic situation was judged superior to another only if at least one person had been made better off without anyone else being made worse off.
Numerous utility functions can be derived, one for each point on the production possibility frontier PQ in the diagram above.
Often known as economics with a heart, it is done principally through the optimum distribution of wealth — the best allocation of resources. But Pareto failed to judge this condition of increasing and decreasing of welfare together in the society.